1 files changed, 1 insertions, 0 deletions
diff --git a/js/Linear/DLR.js b/js/Linear/DLR.js
index 8c9fc521..1c248b71 100644
--- a/js/Linear/DLR.js
+++ b/js/Linear/DLR.js
@@ -45,6 +45,7 @@ function DLR() {
             }
             if (degree(this.num)>degree(this.den)) {
                 message("Transfer function must be proper");
+                throw "user error";
                 var ok = false;
             }
             if (ok) {